Question

The equation 4NH₃5O₂ → 4NO + 6H₂O represents the catalytic oxidation of ammonia. If 100 cm³of ammonia is used, calculate the volume of oxygen required to oxidise the ammonia completely.

Answer 1

4NH₃ + 5O₂ → 4NO + 6H₂O
  4 vol : 5 vol    4 vol : Nil
If 4 volumes of NH₃ requires = `5/4` x 100
= 125 cm³ oxygen.